For physical thinness (of people or objects):
* Mince: This is the most common word for "thin" when referring to someone's body.
* Fin: This can also be used for thinness, but it's more common for objects like paper or fabric.
For other meanings of "thin":
* Rare: This is used for thin slices of meat.
* Flétri: This means "withered" and can be used to describe something that has become thin due to age or lack of nourishment.
* Élancé: This describes something that is tall and slender.
Here are some examples:
* Elle est mince: She is thin.
* Ce papier est fin: This paper is thin.
* Le steak était rare: The steak was rare (thinly sliced).
* Une feuille flétrie: A withered leaf.
* Un arbre élancé: A slender tree.
It's important to choose the right word based on the context and what you want to convey.